Pile wire



March 4, 1924. 9 4 1,485,939

- R. E. THOMPSON PILE WIRE Filed Nov. 1', 1920 @4M/MM, l

Patented er., 4,1924.,

AOHUSETTS, A. CORPORATION 0F man Winn.

Application Med November. 1, 1920. Serial No. 420,962.

To all whom it may' oom-em f Be it known that I, RALPH E. TnolursoN, a citizen of the United States residing at Brookline, in the county of orfolk and State of Massachusetts, have invented cern the rear end of the strip 7 is first moved tain new and useful Improvements in Pile Wires, ofwhich the following is a specification..

My invention relates to pile wires for use in looms which weave cut-pile fabrics, and is particularly intended to provide a simple and eflective arrangement for securing detachable blades in'these wires in such man'' ner that the blades will be positively locked to the wires during use butfmay be readily detached therefrom when desired. It also includes a novel formation of the bladeholding portion of the wire.

e features in which my invention resides are hereinafter described in connection with the accompan Figure 1 is a si e elevation of a portion of a pile wire having my invention applied thereto; l

Figure 2 is a top edge view of the same;

Figure 3 is a view similar to Figure ll showing the pile wire with the blade an blade-locking means removed;

Figure 4 is a transverse section on the 1in Figure 1; and

Figure 5 is a side view of adetachable blade. p I

n Figures 1, 2 and 3, 2 indicates the free or front end portion of a pile wire which, except as hereinafter described, may be of any usual or desirable construction, its tip 3 being enlarged vertically and bent laterally' at its extremity as is customary; At the rear portion of the tip 3 there is provided a lrecess 4 for the reception of thedetachable blade 5, which is thin and dat and is shown as having a substantiallytrian lar shape, although this particular shape 1s not essential., The lower edge of the blade is adapted to seat on the bottom of the recess 4, which Yis just wide enough to receive the blade and is so shaped that when the blade is seated in the recess its cutting edge (i slants downward and rearward above the rear edge ofthe tip 3, with its rear end located below the top of the wire 2. indicates a thin strip of sprin I metal located on one side of the tip 3 an riveted thereto as at 8, its rear end being rovided with a small punch pin 9 made of ardenedY sl and l in transverse alignment with a perforation 10 extending through the tip- 3 in a linewhich is' intersected by the blade 5 when in operative position in the recess 4. i

To secure a blade such as 5 to the wire 2 outwardly to an extent suiicient to withdraw the pin 9 from the recess 4 and the blade is then inserted into the recess and po'- sitioned'therein as shown in liigure 1. The pin 9 is then tapped with a hammer or similar implement and is thereby caused to punch a hole in the blade, which is made thin enough to enable this to be readily done.

The result is that the pin 9 is located in the pin 9 is withdrawn from the blade, whereupon the latter slot 4.

Inasmuch as the recess 4 should be located is free to be lifted out of the Yexactly in the longitudinal center of the wire 2 and it is diiicult to cutfsuch a recess in the edge of the wire and tip with the required degree of accuracy, I have devised a novel formation of the parts 2 and 3 according to which these parts are made from sheet metal folded along the line of their lower edge, with rivets 11 or other suitable means for holding the folds together in front of and behind the recess 4, half of which is formed in one of the folds by stamping or otherwise and the other half' is formed in the other fold.. in this way the recess 4 may be formed easily and accurately, but it will be vevident that the folded formation is not essential to the o eration of the blade-locking means e scribed Whenemployed, the curved ex- 'tremity of the ti 3 is preferably provided on one of the fol s only, as shown in Figure '2, the other fold being terminated at a short distance ahead of the recess 4. In this way a s ace is left for the reception of the attac ed end of the strip 7 without unduly increasing the thichess of the combined parts, but a tip constructed as above described ma)7 obviously be used in connection with various means for maintaining the blades in -operative position.

Ivclaim: p

1. A pile wire provided near its free end with a recess ada ted to ,receive and supportv a thin-blade an with a perforation intersecting said recess, and a spring strip secured to the wire and provided with a punch pin adapted to enter said perforation.

`2. The combination of a pile wire provided near its free end with a longitudinally-extendi recess and with a transversely-extendmg erforation intersecting said recess,r a thm lade `adapted to be inserted into and removed from said recess, and a spring strip secured to the wire and carrying a punch pin located in line with said perforation and adapted to be driven through the blade.

3. The combination of a pile wire provided near its free end with a longitudinally-extending recess and with a transversely-extendmg erforation intersecting the recess, a thin lade adapted to be inserted into and removed from said recess and to seat on the bottom of the latter in euch position that its cutting edge is exresaca@ posed above the recess andy slants downward and backward with respect to the wire, and a spring strip secured to the wire and carrying a` punch pin located in line with said perforation and adapted to be kdriven through the blade after the latter has'been seated in the recess, thereby locking the blade to the wire and holding it in fixed relation thereto.

4. A pile Wire constructed at its -freeend of sheet metal folded along the bottom edge of the wire andy provided with a bladereceiving recess formed half in one fold and half in the other, said folds being in contact with and secured to each other in front of and behind the recess.

5. A pile wire constructed at its free end of sheet metal folded along the bottom edge of the wire'and provided with a blade-receiving recess formed half in one fold and half in the other, said folds being secured together in front of and behind the recess and one of the folds being terminated at a distance behind the extremity of the wire,

and blade-locking means vsecured to thel lon er fold in front of the shorter fold.

lgned at Boston, Mass., this '29thday of Oct., 1920.'

i y RALPH E. THGMPSON. 

